JP3809865B2 - Air cleaning filter device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a filter device using a wavy filtering filter material that is widely used for air conditioning applications and air purifiers, and more specifically, a reinforcing frame on the periphery of the filtering filter material that has been pleated into a wavy shape The present invention relates to an air purifying filter device fitted with.
[0002]
[Prior art]
A filter material that purifies air is generally a filter material that increases the surface area through which air passes by pleating a material such as a nonwoven fabric or filter paper into a wave shape. For example, as shown in FIG. 14, this type of filter material is manufactured by folding a large-area non-woven fabric or a filter paper-like material alternately at a constant pitch in the width direction in the opposite direction and pleating into a triangular wave shape.
[0003]
The wave filter material 1 shown in FIG. 14 has an air purification function that deteriorates when the wave pitch p of the wave surface becomes uneven. Therefore, the reinforcing material 2 is attached to the end face of the wave edge 1a of the wave filter material 1 by an adhesive or hot melt method. It is fixed and commercialized. Alternatively, in the case of a wavy filter material for special use (not shown), it is a product as a wooden frame filter device in which a rectangular wooden frame is integrally assembled to the peripheral edge with an adhesive or the like, and the shape of the wavy filter material is fixed by a wooden frame. It has become.
[0004]
14 reinforces the wave pitch p of the corrugated filter material 1 to be constant, maintains the corrugated plate shape of the filter material 1, and stabilizes the overall dimensional shape. That is, when the wave direction of the wave-like filter material 1 is a horizontal direction, the filter material 1 expands and contracts in the horizontal direction and the shape is not stable. Even if a rectangular frame is fitted and reinforced on the two straight edges 1b, the wavy filter material 1 expands and contracts with respect to the frame and comes off the frame, or in the lateral direction of the filter material 1. Therefore, the reinforcing material 2 for fixing the wave pitch p is fixed to the open end face of the wave-like peripheral portion 1a of the filter material 1. This type of reinforcing material 2 is a tape, a line, or the like that does not expand and contract. In the case of a tape, the opening of the end surface of the wavy peripheral edge 1a of the filter material 1 is blocked, and air leakage from the opening end surface is suppressed. Improves filtration performance and air purification function of the entire filter material.
[0005]
[Problems to be solved by the invention]
A single wavy filter material as described above is easy to mass-produce and can be manufactured at low cost, but the workability of the work process for fixing the reinforcing material and the wooden frame to stabilize the shape on the wavy filter material is poor, and the wavy filter material It is difficult to reduce the manufacturing and assembling cost of the filter device using the filter. Further, the number of parts of the air cleaning filter material alone increases due to the reinforcing material, and the material cost increases accordingly. In particular, those using wood frame filter materials are thick and bulky, and are expensive to transport, and have many problems in terms of temperature management such as adhesives to the wooden frame and recycling of filter materials during disposal. There is a problem in that it is a waste and the disposal cost for disposal becomes high.
[0006]
Furthermore, if the wavy filter material becomes dirty, it can be washed and regenerated, or discarded and replaced with a new one. However, in the case of cleaning regeneration, the complicated shape of the wavy filter material makes it difficult to clean effectively. There is a problem that the size of the playback device increases due to the complicated and bulky shape. Further, when the dirty wavy filter material is discarded and replaced with a new one, the following becomes a problem. New filter materials to be replaced are stored in filter manufacturing factories, etc., shipped to the factory, and sold over the counter. Such replacement filter materials are made by fixing the wave pitch of the wavy filter material with a reinforcing material or the like. Therefore, the replacement filter material can be stored in a smaller size than the standard frame size, stored, transported and sold in stores, etc. It is difficult to reduce storage space for replacement filter materials, store sales space, and transportation costs.
[0007]
An object of the present invention is to provide a filter device for air cleaning which can easily reduce manufacturing and assembling costs and transportation costs and can advantageously perform cleaning and regeneration processing of filter materials.
[0008]
[Means for Solving the Problems]
The technical means for achieving the above-mentioned object of the present invention is a filter frame comprising a filter-type filter material having a rectangular shape and a first frame and a second frame that can be assembled and separated from each other. The first frame body has an opening serving as a vent, a surface frame portion that is attached to the wavy peripheral edge portion from either one of the front and back sides of the filter material, and a surface frame portion that is attached to the straight peripheral edge portion. And at least one protrusion that is inserted between adjacent ridges of the wavy surface of the filter material and restricts the shape of the filter material in the direction perpendicular to the pleat fold line direction is attached to the wavy peripheral portion. The second frame has an opening that serves as a vent, a surface frame that is attached to the wavy peripheral edge from one side of the front and back of the filter material, and a straight peripheral edge. It extends inward from the outer side of each face frame part to be attached and each face frame part of this second frame body. In a frame portion having sides frame part which is deposited on a rectangular four sides of Iruta material, the inner surface of pleat crease lines and said parallel surface frame part of the filter material, and the side frame portion rising from the plane frame portion When a straight peripheral portion parallel to the pleat fold line of the filter material is inserted, a locking plate is integrally formed to form a locking groove that temporarily holds and holds the straight peripheral portion , and the second frame body has a filter. The peripheral edge of the material is fitted from one side of the front and back of the peripheral edge, the straight peripheral edges at both ends of the filter material are inserted into the corresponding locking grooves and temporarily held , and then the first frame is It is characterized by a structure in which the first frame and the second frame are fitted together from the other side of the peripheral edge of the filter material and the filter material is accommodated and assembled together.
[0009]
Here, the first frame body and the second frame body are frames such as an aluminum frame and a resin frame, and each is detachably attached to the peripheral edge portion of the wavy filter material, and the filter material is reinforced during the attachment. The wavy shape is maintained. In addition, the filter material on which the first frame body and the second frame body are attached and fitted can be applied as a single product simply by pleating filter paper or the like into a wavy shape. In this case, it is possible to apply a material which is stretched into a fabric and easily and effectively cleaned, or is folded so as to minimize the wave pitch and stored in a minimum space.
[0011]
The first frame further has a side frame portion that stands up in a bent shape from the outer side of the face frame portion and supports each side of the filter material, and the side frame portion of the first frame body and the second frame body The side frame part is inserted into each other and assembled.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiments 1 to 8, in FIGS. 9 to 13 will be described in order.
[0013]
The air cleaning filter device shown in the exploded view of FIG. 1 is fitted into a wavy filtration filter material 3 having a rectangular shape as a whole and a rectangular peripheral portion of the filter material 3 so as to be detachable from both front and back sides of the peripheral portion. The first frame 4 and the second frame 5 are configured. The filter material 3 is manufactured, for example, by bending a material such as a long, non-woven fabric or a filter paper, which is alternately bent at a constant pitch in the opposite direction, and pleated into a triangular wave shape at a predetermined length. The peripheral edge of the rectangular filter material 3 is formed of two opposing wavy peripheral edges 3a in which valleys m and peaks n are alternately arranged, and the remaining two opposing opposing peripheral edges 3b. It is desirable that the material of the filter material 3 is excellent in pleat processability, and is rich in heat processability and excellent in heat resistance, whose shape does not easily change during cleaning. Further, the wave pitch p (adjacent peak portion interval or adjacent valley interval) of the filter material 3 before the pair of frames 4 and 5 are fitted is arbitrary, and the filter material 3 Can be extended or compressed in the plate direction.
[0014]
The pair of first frame body 5 and second frame body 4 are frame members having substantially the same size and shape made of a material such as aluminum or resin that can be washed many times and has excellent dimensional stability. The first frame body 4 includes, for example, a surface frame portion 4′a that is attached to the wavy peripheral edge portion 3a and a surface frame portion 4′b that is attached to the straight peripheral edge portion 3b from either one of the front and back sides of the filter material 3. And side frame portions 4 ″ a, 4 ″ b that extend inwardly from the outer sides of the respective face frame portions 4′a, 4′b and are attached to the four rectangular sides of the filter material 3. Have. The second frame body 5 includes a surface frame portion 5′a that is attached to the wavy peripheral edge portion 3a and a surface frame portion 5′b that is attached to the straight peripheral edge portion 3b from either one side of the filter material 3. The side frame portions 5 ′ a, 5 ′ b have side frame portions 5 ″ a, 5 ″ b that extend integrally inward from the outer sides of the face frame portions 5 ′ a, 5 ′ b and are attached to the four rectangular sides of the filter material 3. .
[0015]
In addition, a protrusion 6 that regulates the corrugated plate shape of the filter material 3 is formed on each surface frame portion 4 ′ a of the first frame body 4 that is attached to the waved peripheral edge portion 3 a of the filter material 3. The protrusion 6 protrudes from one position on the inner surface of the surface frame portion 4′a or a plurality of equally spaced portions by stamping molding or the like. In the drawing, the center portion in the longitudinal direction of one surface frame portion 4′a is formed. Protrusions 6 are formed at a plurality of locations. For example, as shown in FIG. 3, the shape size of one protrusion 6 is set so as to be locked in the wave width direction to one valley m of the wave-like filter material 3. The protrusion 6 is locked to each of the valleys m at an arbitrary position of the wavy peripheral edge 3a of the wavy filter material 3, so that the expansion and contraction operation in the wave direction of the filter material 3 is restricted by the protrusion 6, and the filter material 3 Is maintained in a substantially regular corrugated plate shape with a predetermined wave pitch p. The number of such protrusions 6 may be set to the same number as the plurality of troughs m of the filter material 3, but setting to a smaller number than the troughs m improves the assemblability of the filter device described later. This is desirable.
[0016]
When the first frame 4 is an aluminum plate product, for example, as shown in FIG. 6, the cross-sectional L-shaped frame 4 c of the face frame portion 4 ′ a and the side frame portion 4 ″ a, the face frame portion 4 ′ b, and the side frame portion. If the end faces of the L-shaped frame 4d having a cross section of 4 ″ b are butted at right angles and the butted portions are coupled by an L-shaped coupling plate 4e made of aluminum, the first frame 4 can be manufactured in a rectangular shape. Can be manufactured with high mass productivity. The second frame 5 may be manufactured in the same manner as the first frame 4.
[0017]
FIG. 2 shows a filter device in which the first frame body 4 and the second frame body 5 are fitted to the rectangular peripheral edge of the wavy filter material 3, and respective cross-sectional views thereof are shown in FIGS. 3 and 4. In assembling the filter device, first, the peripheral edge of the corrugated filter material 3 is fitted to the second frame 5 from either the front or back side of the peripheral edge, and then the first frame 4 is attached to the peripheral edge of the filter material 3. It is performed by fitting from the other one side. When both the frame bodies 4 and 5 are fitted from the front and back sides of the filter material 3, the side frame portions 4 ″ a and 5 ″ a and the side frame portions 4 ″ b and 5 ″ b of the both are attached to the filter material 3. In a state where they are polymerized along the rectangular end faces of the two, they are bonded together so as to be separable from each other.
[0018]
For example, as shown in FIG. 3, when the peripheral portion of the wavy filter material 3 is fitted to the second frame 5, the horizontal direction is the wave direction of the wavy filter material 3 by making the whole substantially horizontal. To make the entire wave pitch p of the filter material 3 uniform. At this time, the filter material 3 vibrates to the left and right in the wave direction in a state where the waved peripheral edge portions 3a of the two opposite sides are substantially freely held on the surface frame portion 5'a of the second frame body 5, The wave pitch p is equalized by the elastic restoring force. Next, the first frame 4 is put on the substantially horizontal second frame 5 and the frames 4 and 5 are joined together, and the two are engaged with each other in a detachable manner.
[0019]
The union by the fitting of the two frames 4 and 5 is desirably performed as follows for the reason described later. That is, the slits 7 formed at both ends of the side frame 4 ″ a of the first frame 4 shown in FIGS. 1 and 5 are inserted into both ends of the side frame 5 ″ b of the second frame 5, The side frame 4 ″ b of the first frame 4 is overlapped on the outer surface of the side frame 5 ″ b of the second frame 5, and the side frame 5 ″ of the second frame 5 as shown in FIG. The side frame portion 4 ″ a of the first frame body 4 is fitted between the inner surface of a and the end surface of the wavy peripheral edge portion 3a of the filter material 3.
[0020]
By inserting and inserting the side frame portion 4 ″ b of the first frame 4 so as to overlap the outer surface of the side frame portion 5 ″ b of the second frame 5 to which the filter material 3 is fitted as described above, The one frame 4 can be easily fitted to the second frame 5 without being obstructed by the straight peripheral edge 3 b of the filter material 3. Further, the side frame portion 4 ″ a of the first frame body 4 is fitted between the side frame portion 5 ″ a of the second frame body 5 on which the filter material 3 is fitted and the end surface of the wavy peripheral edge portion 3a of the filter material 3. By inserting, the side frame portion 4 ″ a of the first frame body 4 directly closes the opening end surface of the wavy peripheral edge portion 3a of the filter material 3, and the air leakage from the end surface opening is suppressed, thereby reducing the filter material 3 Make the air purification function stable and good.
[0021]
Here, as shown in the dimension leader line in FIG. 1, the distance between the two opposite side frame portions 5 ″ a of the second frame 4 is L, and the length of the filter material 3 in the wavy direction is D. , L = D to (D−0.5 mm) is desirable.The side frame portion 5 ″ a of the second frame 5 on which the filter material 3 is fitted and the filter material 3 The side frame portion 4 ″ a of the first frame body 4 can be securely inserted between the end faces of the wavy peripheral edge portion 3a with good workability, and the side frame portion 4 ″ a of the first frame body 4 is made of the filter material 3. The opening end face of the wavy peripheral edge 3a is airtightly closed, and air leakage from the end face opening is effectively suppressed, and the air purification function of the filter material 3 is made more stable and favorable. If L> D, a gap is formed between the side frame portion 4 ″ a of the first frame 4 and the wavy end surface of the filter material 3 to increase the amount of air leakage, and the air purification function of the filter material 3 is improved. Further, when L <(D−0.5 mm), the side frame portion 4 ″ a is caught by the wavy peripheral portion 3a of the filter material 3 when the first frame body 4 is inserted into the filter material 3. Assembling work of the first frame 4 to the second frame 5 becomes difficult.
[0022]
Further, the side frame portion 4 of the first frame body 4 is disposed between the side frame portion 5 ″ a of the second frame body 5 to which the filter material 3 is fitted as described above and the end surface of the wavy peripheral edge portion 3a of the filter material 3. "A is inserted, and the projection 6 of the face frame 4'a of the first frame 4 is locked to the trough m of the filter material 3 so that the wavy shape of the filter material 3 is stabilized. It becomes. Although not shown, if the second frame has a protrusion similar to the first frame, the wave filter material fitted to the second frame is vibrated left and right as described above to change the wave pitch. When equalizing, the protrusions of the second frame obstruct the wave pitch equalization work, so it is effective to provide such protrusions only on one of the first frames.
[0023]
In the air cleaning filter device of FIG. 2, when the filter material 3 is soiled due to adhesion of dust or the like and the air cleaning function is lowered, the first frame body 4 and the second frame body 5 are separated and the filter material 3 is removed, Only the dirty filter material 3 is discarded or washed and recycled as described later, and the pair of frames 4 and 5 are reused as new or recycled filter materials. A new replacement filter material is, for example, a wavy filter material 3 ′ shown in FIG. Since this replacement filter material 3 'can be expanded and contracted in the width direction of the corrugated wave, it can be reduced in the width direction, stored in a minimum size and in a minimum volume, transported and sold in stores, etc. This is desirable in terms of reducing the storage space for replacement products and store sales, and reducing transportation costs.
[0024]
Note that the cleaning for recycling the dirty filter material 3 can be performed in each step shown in FIG. 8, for example, because the single wave filter material 3 can be expanded and contracted. First, after the dirty single wave-like filter material 3 is stretched, it is immersed in an alkali cleaning solution at 60 to 70 ° C. in the pre-washing tank 11 and preliminarily washed, and then is washed in the main washing tank 12 with washing water at 60 to 70 ° C. Spray and apply ultrasonic vibration to perform main cleaning. The cleaned filter material 3 is rinsed in a rinse tank 13 with a high-pressure spray using a water stream containing an antifouling agent at room temperature, and then the filter material 3 is forcedly dehydrated at room temperature through a dewatering roller 14, and finally dried. It is forced to dry with hot air of 90-100 ° C. through a furnace 15. Thus, by continuously washing and drying the wavy filter material while stretching it into a fabric, it becomes easy to perform high-speed cleaning in a space-saving manner, and facilitate the practical application of recycling of the wavy filter material.
[0025]
Next, the air cleaning filter device shown in FIGS. 9 to 13 will be described. The basic structure of this filter device is the same as that of the embodiment of FIG. 1, and the same or corresponding parts in the filter device of FIG. 9 as those of FIG. .
[0026]
The first frame body 4 and the second frame body 5 in the filter device shown in FIGS. 9A and 9B are, for example, resin molded products. As shown in FIGS. 10 and 11, the first frame body 4 has rectangular surface frame portions 4 ′ a and 4 ′ b, and the surface frame portions 4 ′ a and 4 ′ b are formed of the rectangular filter material 3. It is made to contact | abut to the peripheral part of the single side | surface side. As shown in FIGS. 12 and 13, the second frame 5 includes rectangular face frame portions 5 ′ a, 5 ′ b and side frame portions 5 ″ a, 5 ″ b bent integrally from the respective outer sides. The face frame portions 5 ′ a, 5 ′ b abut on the peripheral edge of the other side of the rectangular filter material 3, and the side frame portions 5 ″ a, 5 ″ b are on the rectangular end surface of the filter material 3. It is trying to confront.
[0027]
In the embodiment of FIG. 9, a locking plate 5 c is integrally formed upright on the inner surface of the face frame portion 5 ′ b of the second frame body 5 corresponding to the straight peripheral edge portion 3 b of the filter material 3, A locking groove 5d having a predetermined width is formed between the plate 5c and the side frame portion 5 "b opposite to the plate 5c, and the straight peripheral edge 3b of the filter material 3 is inserted into the locking groove 5d and temporarily held. The height of the locking plate 5c from the face frame 5′b is set to be lower than the height of the side frame 5 ″ b by about the thickness of the filter material 3. The width of the locking groove 5d is set to be about several times the thickness of the filter material 3, and the locking groove 5d has a straight peripheral edge portion of the filter material 3 as shown in FIG. 9 (A) or (B). One or two outer sides of 3b are inserted.
[0028]
When manually fitting the corrugated filter material 3 to the second frame 5, the compressed filter material 3 is expanded to a specified size with both hands as shown in FIG. To be inserted into the locking groove 5d. For example, as shown in FIG. 9A, one outermost sheet of the straight peripheral edge 3b of the filter material 3 is inserted into the locking groove 5d, and a valley m between the first sheet and the second sheet is formed. Lock to the locking plate 5c. Alternatively, as shown in FIG. 9 (B), the outermost sheet of the straight peripheral edge 3b of the filter material 3 and the next second sheet are inserted into the locking groove 5d so that the second sheet is overlapped. The valley m between the third sheets is locked to the locking plate 5c.
[0029]
As shown in FIGS. 9 (A) and 9 (B), the filter medium 3 is held in the second frame 5 by temporarily retaining the straight peripheral edge portions 3b at both ends of the filter medium 3 by engaging with the locking plates 5c. The assembly work of the filter material 3 to the second frame 5 can be performed easily and quickly while being held at the prescribed size. In addition, since the filter material 3 is held at a specified size in the second frame 5 and the shape is stabilized by inserting the straight peripheral edge 3b whose shape is not stable due to expansion and contraction into the locking groove 5d, the shape is stabilized. Then, the assembly work of the first frame 4 to the second frame 5 to be performed next becomes easy.
[0030]
In addition, the shape shown in FIG.10 and FIG.11 corresponding to the 2nd frame 5 which has the said latching plate 5c is desirable for the 1st frame 4 in embodiment of FIG. That is, the rectangular surface frame portions 4 ′ a, 4 ′ b of the first frame body 4 are reinforced with rib portions 4 c that are integrally bent on the outer side of the outer surface, and the wavy peripheral edge portion 3 a of the wavy filter material 3 is reinforced. A protrusion 6 that regulates the shape of the filter material 3 is integrally formed on the inner surface of the corresponding surface frame portion 4 ′ a, and is formed on the inner surface of the surface frame portion 4 ′ b corresponding to the straight peripheral edge portion 3 b of the wavy filter material 3. A projecting piece 4d that is inserted into the locking groove 5d of the second frame 5 is integrally formed.
[0031]
As shown in FIG. 9, after the filter material 3 is fitted to the second frame 5 using the locking groove 5 d, the first frame 4 is fitted to the second frame 5. The protruding piece 4d of the body 4 is inserted into the locking groove 5d, and the straight peripheral edge 3b of the filter material 3 previously inserted into the locking groove 5d is pressed against the locking plate 5c by the protruding piece 4d. To do. By doing in this way, the straight peripheral part 3b which is easy to expand and contract of the filter material 3 clamped by the both frame bodies 4 and 5 is firmly fixed, and the deformation of the wave-like filter material 3 is surely prevented.
[0032]
In addition, in the 1st frame 4 shown by FIG.10 and FIG.11, the lattice frame 4e is integrally formed in the inner side of rectangular surface frame part 4'a, 4'b, and drop-off | omission of the filter material 3 is carried out. I try to prevent it. Similarly, in the second frame 5 shown in FIGS. 12 and 13, the lattice frame 5e is formed integrally with the rectangular face frame portions 5′a and 5′b. However, the lattice frames 4e, 5e is not necessarily required.
[0033]
The present invention is not limited to the above embodiment, and in particular, the shapes of the first frame body and the second frame body are appropriately modified depending on the material thereof. For example, each side of the end face of the filter material is supported by the second frame body. When the side frame portion is provided, it is not always necessary to provide the same first side frame portion on the other first frame body, and the first frame body is constituted only by a surface frame portion having a protrusion that regulates the shape of the filter material. It is also possible to do.
[0034]
【The invention's effect】
According to the present invention, the pair of first and second frame members are separably fitted and fitted from the front and back side surfaces of the peripheral portion of the corrugated filter material, and the projections of one frame member are corrugated of the filter material. The filter material is reinforced in a fixed shape with the filter material held in the predetermined corrugated shape by engaging with the valley at the periphery, so mass production is easy by simply folding the filter material into a wave shape. A low-cost single item can be used, and the material cost and manufacturing / assembling cost of the filter device can be reduced. In addition, the first frame body and the second frame body can be easily separated from the filter material, and the filter material separated from the frame body can be easily stretched into a workpiece and washed and dried. It becomes easy to recycle materials and save space in recycling equipment. In addition, since the replacement of the dirty filter material is also a wavy filter material that can be expanded and contracted, this replacement can be reduced to a smaller size than the frame size and can be packed, stored, sold at stores, etc. This makes it possible to reduce the storage cost and transportation cost of the replacement filter material, and to reduce the storage space and the store sales space.
[0035]
Moreover, the shape of the straight peripheral part where the wave-like filter material expands and contracts and the shape is not stabilized by forming a locking groove in which the straight peripheral part of the wave-like filter material is inserted and temporarily held in the second frame. At the time when is attached to the second frame, the mounting operation of the wavy filter material to the second frame is facilitated, and the mounting operation of the first frame to the second frame is also filtered. It becomes easy without being disturbed by the material, and the assembling work of the filter device can be improved.
[0036]
In addition, the first frame body has a protrusion that overlaps the side frame portions of the first frame body and the second frame body at the end surface of the peripheral edge portion of the wavy filter material and engages with the valley portion of the wavy peripheral edge portion of the filter material. By closing the opening at the end face of the wavy peripheral edge of the filter material with the side frame, air leakage from the open end face of the wavy peripheral edge of the filter material is suppressed, and the air cleaning function of the entire filter material is enhanced. Is done.
[Brief description of the drawings]
FIG. 1 is an exploded perspective view of an air cleaning filter device according to a first embodiment of the present invention.
FIG. 2 is a perspective view of the filter device after assembly.
FIG. 3 is an enlarged cross-sectional view taken along line T1-T1 in FIG. 2;
4 is a cross-sectional view taken along the line T2-T2 in FIG. 3;
5 is a partially enlarged perspective view of a first frame body and a second frame body in the filter device of FIG. 1;
6 is a partial perspective view of a first frame body in the filter device of FIG. 1;
7 is a perspective view of the filter device when the filter material is stored in FIG.
FIG. 8 is a side view showing an overview of a filter material cleaning and drying process system.
9A and 9B are partial cross-sectional views of an air cleaning filter device showing a second embodiment of the present invention.
10 is a bottom view of the first frame body in the filter device of FIG. 9;
11 is a cross-sectional view taken along the line T3-T3 in FIG. 10 and a partially enlarged view thereof.
12 is a plan view of a second frame body in the filter device of FIG. 9;
13 is a sectional view taken along line T4-T4 in FIG. 12 and a partially enlarged view thereof.
FIG. 14 is a perspective view of a wavy filter material in a conventional air cleaning filter device.
[Explanation of symbols]
3 Filter material 3a Wavy peripheral edge 3b Straight peripheral edge m Valley part n Mountain part 4 First frame body 4'a, 4'b Frame part, face frame part 4 "a, 4" b Frame part, side frame part 5 Second frame 5'a, 5'b Frame, face frame 5 "a, 5" b Frame, side frame 5c Locking plate 5d Locking groove 6 Projection

Claims (1)

A filter-type filter material having a rectangular shape as a whole and pleated into a wave shape, and a filter frame composed of a first frame and a second frame that can be assembled and separated from each other,
The first frame includes an opening serving as a ventilation hole, a surface frame part that is attached to the wavy peripheral part from either one side of the filter material, and a surface frame part that is attached to the straight peripheral part. And at least one protrusion that is inserted between adjacent crests of the wavy surface of the filter material and restricts the shape dimension of the filter material in the direction perpendicular to the pleat fold line direction is attached to the wavy peripheral edge portion. On the inner surface of the face frame portion to be
The second frame body includes an opening serving as a vent, a surface frame portion that is attached to the wavy peripheral portion from one side of the front or back of the filter material, and a surface frame portion that is attached to the straight peripheral portion. A frame portion having a side frame portion that extends inward from the outer side of each face frame portion of the second frame body and is attached to the four sides of the rectangular filter material, and parallel to the pleat fold line of the filter material When the straight peripheral edge parallel to the pleat fold line of the filter material is inserted into the inner surface of the face frame part with the side frame part rising from the surface frame part, the straight peripheral part is temporarily held. Integrally having a locking plate that forms a locking groove ;
The peripheral edge of the filter material is fitted to the second frame body from either the front or back side of the peripheral edge, and the straight peripheral edges at both ends of the filter material are inserted into the corresponding locking grooves and temporarily held. Next, the first frame body is fitted from the other side of the peripheral edge of the filter material, and the first frame body and the second frame body are accommodated in the filter material and assembled to each other. apparatus.

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